Another Apple-to-switch-Macs-to-ARM post. "Apple engineers have grown confident that the chip designs used for its mobile devices will one day be powerful enough to run its desktops and laptops, said three people with knowledge of the work, who asked to remain anonymous because the plans are confidential. Apple began using Intel chips for Macs in 2005." No idea when Apple will make the switch, but they will do it. I'm thinking 5-10 year timeframe.

Apple has an inhouse ARM design group
....---> more profit
....---> better control
....---> custom designs possible
........---> lock in (like.iP[od|ad|hone] or consoles) could be integrated in HW
........---> services like remote system lock via network could be integrated in HW
........---> custom coprocessors could be integrated